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Two Part Polyurethane Resin

Low Viscosity Polyurethane Potting Compound SP2602◆Detailed Product DescriptionSP2602 is two component no solvent RTV/Heating curing resin elastomer compound, mainly for using two component sealing,

If you are planning to wholesale best cheap and high quality two part polyurethane resin China, or hot sale two part polyurethane resin in China from professional two part polyurethane resin manufacturers and suppliers and factory, please feel free to contact SEPNA, and welcome to check products price with us.

Low Viscosity Polyurethane Potting Compound SP2602

◆Detailed Product Description

SP2602 is two component no solvent RTV/Heating curing resin elastomer compound, mainly for using two component sealing, and potting field.


1.Low viscosity, easily process

2.Excellent performance on low-temperature and aging

3.Excellent and stably electrical dielectric

4.Very low Water absorption 

5.Good adhere to most metals and plastics


It’s specifically formulated for sealing & potting of water permeable, communications equipment, junction boxes, transformers, electronic instrument tray components, electronic ignition controllers electronic sensors etc

◆Data Table

Model Number






Black Fluid

Brown Fluid

Viscosity, cps(25℃)

800 ± 200

100± 50

Gravity, g/cm3



Mixing ratio, by weight

A : B = 2.8 :1

Working time, mins


Curing time, hrs


Hardness, shore A





Water absorption, after 30 days immersion

< 0.15 %

Dielectric strength, kV/mm, 25℃


Volume resistivity, DC500V,Ω·CM


Dielectric loss factor, 50HZ


Working Temperature, ℃


MAX Temperature, Short  time,(UP to 0.5hr ℃



①All data above were tested under standardized condition. The data is with 200g sealant testing feedback

②All data listed in the chart were for the generalized item in the series; please refer to the related data sheet for special items.

③Storage condition has a direct impact to the products’ shelf life, Please refer to the instruction for special items’ storing.

Cup foam test

Testing condition , stirring speed: 1500rpm, Beater diameter: 50mm,Cups volume: 250ml

Ratio of weight (A/B)

2.8 / 1


Material temperature



Stirring time



No-flowing time



Note:The weight of sealant is 200g.

The Operation time of SP2601: 25mins, No-flowing time 45mins, When 70mins, the hard ness is shore A 10.

The Operation time of SP2601K: 20mins, No-flowing time 35mins, When 50mins, the hardness is shore A 10.

The Operation time of SP2601KK: 10mins, No-flowing time 20mins, When 30mins, the hardness is shore A 10.

The curing speed under different conditions

The curing speed of SP2601(the sealant is 500g, A:B = 2.8 : 1 )


Equipment operation process

Material preparation: Stirring in the original drum, then pouring into dispenser.

To avoid bubbles inside of finished products, both tank should be usually kept 3 to 5 minutes under the vacuum pressure 0-2mmHg.

Max tolerance: Mixing proportion of deviation may affect mechanical properties, tolerance should be less than 0.5%.

Other: Through the production, should always maintain the tank airtight . the compressed gas should be dry if need, otherwise part B will become sticky, and influence the mechanical properties.

Suggestion of molding condition


Maxing method                

Material temperature 

Part A    25-30 ℃

Part B    25-30 ℃

low pressure Pouring machine (Gear pumps or

volumetric metering pumps or plunger ) 

Recommend to use a static or dynamic mixer   

Equipment anti-curing time setting : 

The operation time of glue: 25-35mins, its equipment anti-curing spit time settings control within 10mins

Manual process

1.Temperature: Before using, keep the material under 25± ℃ to ensure its reactivity and viscosity.

2.Mixing: weigh the material at a ratio according to the above.

3.Preparation: Dry all containers and mould in 60 ℃ oven for 1 hours to remove moisture.

4.Process: put A and B into a container. Mixing 1-2 minutes. Degassing under 0.1 Mp negative  pressure to avoid the bubble. then potting smoothly. Should avoid the excessive speed to involving into air bubbles. 

5.Cleaning: cleaning the containers by organic solvents, such as acetone and chloroform,etc.

Bagged PU operation process

1.Torn aluminum foil, please check if there are obvious bulging of AB materials;bulging is failed product.

2.Take our spacer bars between AB material, mixing AB material. Knead AB material 2-3 minutes to mix it evenly, tear PE bags from the incision, pour the mixed material into the container. Curing time will need about 50 minutes at room temperature 25 ℃. No viscidity on the surface.



Each part is 200kg/pail         Transported as general chemical 


1. Bucket: Unopened material should be stored in good sealing of the barrel, to avoid moisture intrusion, affecting quality of raw materials. Opened material should be used up as soon as possible.

Store in a cool, dry area, avoid direct sunlight; storage temperature: 10-30 ℃, 

Shelf life: A: 12 months, B : 12 months.

2. Aluminum foil bag : The shelf life of unopened bags is 2 years; this package is vacuum plastic packaging, if aluminum foil bags in storage period has bulging phenomenon, regarded as defective product, it can not be used; please use up within 3 hours after opened foil bags. 

◆Safety Operation Material

MSDS isn't included here. Please read TDS, MSDS and label carefully before operation.You can get MSDS from Sepuna or other distributors, or mail to service center, or call +86-400-882-1323.

◆Product Warranty

All product properties and application details based on information believe to be reliable and accurate. But you still need to test its property and safety before application. The advices we supply don't apply in any circumstances. Sepuna don't make assurance of any other applications outside the specification until Sepuna supply a special written guarantee. Sepuna is only responsible to replace or refund if this product is defective within the warranty period stated above. Sepuna makes it clear that will not be liable of any accidents.


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